Dual CR 3700 RC Serviceanleitung Seite 3
Tuning
lnstructions for
CR 3700
Signal
source
Equipment
settlng
Signal
source setting
Connect on of
measuring instrumenl
Item
to
be tuned
Tuning, Remarks
1)
FM
oscillator
87,5 MHz
DC voLtmeter
to
TP-TP
5
t4
1.6
V DC
+
0.05
V
108
MHz
Check
approx.
8
V
DC
2)
FM
lE
input circuit
FM slgnal
generator
to 75 ohm
antenna
nput
Frequency
with-
out transmitters
approx.
98
N,4Hz
0-1
mV Shift
+
40kAz
Mod.
1
kHz
Tune
to
approx. 98
l\,4H2
Harmonic detector
osciloscope to
UR
speaker output
via
load resistors
T
1,T
102
AF
maxlmum
T
101
AF
and harmonic
distodion
minimurn
90
MHz
Tune
to app.
90
l\,4H2
alrco ls
Ll.
L2.
L3
AF
maximum
3)
FM
lF
(fine tuning)
Antenna
to
75 ohm
antenna input
Beceive strong
FIVI
transmltter
at
ts
nom
na
frequency
DC
voltmeter
to
R
l55
T
101
Determine DC max. and
DC min
T
101
Adlust power
mean
r
142
0V+lmVDC
Repeat
tuning
4)
Transition between monaural,
stereo
and muting; signal
indication,
channel separation
FI\,4
signal generator
to
75 ohm
antenna input
Frequency
with-
out transmitters
approx. 98
IVHZ
mono
key:
Off
Tune
to
approx. 98
N,4Hz
Shifi
+
40
kHz,
Mod.1
kHz
'19
kHz pllot
ON
5pv
Check the
d
splay
SVR
]02
Signal "TUNED"
and
"STEREO"
dls-
play
must
light
up
1mV
AF
voltmeteI osc
llos-
cope
to UR
speaker
output
via
oad
res
stors
SVB
1
03
\laximum
channe separation
5)
Suppression
of
residual
pilot frequencies
(19
kHz)
FM
signal generator
to
75 ohm
antenna lnpui
Frequency
with-
out transmitters
approx.
98
lvlHz
Tune
to
approx. 98
lvlHz
1-2-rlv
l9kHzpiotON
AF
voltmeter
osci loscope
to
L"/B
speaker output
v
a load resistors
LPF 1 (left
channe)
Min
mum
LPF
2
(right channel)
6)
AM
oscillator
Al\1
522kHz
DC
vo
tmeter
to
TP-W
(J 247)
L
101
'1
.55
V DC
+
0,05
V
AM
161
1
kHz
TC
101
B.BVDC+0.2V
LW
1
46 kHz
DC
voltmeter
to
R
131
L 102
3.3 V DC
+
0.1
V
LW
290
kHz
TC
102
6.5VDC+0.2V
7)
AM
lE
input
circuit
AM
stgnal
generator
to AM antenna
input
{
AIV
999
kHz
20uV-1
mV
1
kHz
Mod,
30 %.
999 kHz
AF
voltmeter
oscilloscope to
VR
speaker outpul
via
load resistors
T
103
I\,4aximum
AM 604 kHz
604 kHz
L
104
AN,4
1404
KHZ
1404
kHz
TC
104
LW
1
53 kHz
1
53 kHz
L 103
lW
254
k1z
254
k1z
TO
103
Bepeat tuning
